The use of wet floodproofing vs dry floodproofing always comes up in the E273 class. These two terms can be confusing depending on the complexity of the project. TB 2 is your guide to all things floodproofing. The link will also get you to the other TB's so bookmark it for future use.
If you have TB 2 listed on your website, don't forget to update the document or link.
Read the updated Technical Bulletin (TB) 2,Flood Damage-Resistant Materials Requirements, for guidance on the requirements to use flood damage-resistant materials below the base flood elevation (BFE) in Special Flood Hazard Areas (SFHAs). TB 2 also discusses four additional circumstances in which flood damage-resistant materials are used or recommended: dry floodproofing, accessory structures, limited use of wet floodproofing, and buildings outside SFHAs. View all NFIP Technical Bulletins here